Seismic Analysis of Tall Structures using Shear Walls and Friction Dampers

Gaurav Shreevash, Dr. S. S. Kushwah

Abstract: This study investigates the seismic performance enhancement of Reinforced Cement Concrete (RCC) buildings using passive energy dissipation systems, specifically friction dampers and shear walls. In earthquake-prone regions, RCC structures are vulnerable to seismic damage, necessitating the incorporation of advanced structural design features. The research involves modelling two types of G+14 high-rise RCC buildings a regular-shaped and a Plus-shaped configuration using ETABS software, and analysing them under Seismic Zone V conditions per IS 1893:2016 Part 1. Various support systems, including bare frames, friction dampers, and shear walls, were assessed based on key parameters such as storey displacement, storey drift, storey shear, overturning moment, and base shear. The results reveal that the Plus-shaped building with shear walls (Structure VI) exhibits the most effective seismic resistance, showing the lowest storey displacement (14.47 mm) and minimum story drift. Additionally, the highest base shear (2606.01kN) was observed in this structure, indicating enhanced energy dissipation. Comparatively, the Plus-shaped structure with friction dampers (Structure V) demonstrated the highest storey shear, highlighting the dampers? role in lateral force management. While overturning moments increased marginally, they remained within safe limits. This comprehensive analysis emphasizes the critical role of friction dampers and shear walls in improving seismic resilience. The findings support the strategic integration of these systems, particularly in irregular structures, to enhance overall stability and safety during seismic events.

Keywords: Friction Dampers, Seismic Performance, RCC Structures, Shear Walls, ETABS Analysis